Significant Figures Calculator
Instantly parse significant digits and dynamically round precision via client-side algorithms.
1. Analyze Number
Visual Digit Map
Awaiting input
Significant Figures:
0
2. Precision Rounding
Rounded Output
-
Leverages native JS .toPrecision() algorithms.
Algorithmic Transparency Engine
Awaiting valid dataset to evaluate mathematical rules...
How This Works & The Math Behind It
Significant figures (or sig figs) are the meaningful digits in a number that contribute to its precision. The rules are strict:
- Non-zero digits are always significant (e.g., 45 has 2).
- Captive zeros between non-zero digits are always significant (e.g., 405 has 3).
- Leading zeros are NEVER significant; they are just placeholders (e.g., 0.045 has 2).
- Trailing zeros are significant ONLY if the number contains a decimal point (e.g., 45.00 has 4, but 4500 typically only has 2).
This strictly client-side tool parses your input character-by-character to determine mathematical validity without passing your data to an external server.